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International Journal of Mining and Mineral Engineering最新文献

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Evaluation of the vibration accelerations of drill bit for the well rotative-vibration drilling using the cavitation hydrovibrator 利用空化液压振动器进行旋转振动钻井钻头振动加速度的评价
International Journal of Mining and Mineral Engineering Pub Date : 2020-07-16 DOI: 10.1504/ijmme.2020.10030568
O. Nikolayev, Y. Zhulay, Y. Kvasha, N. Dzoz
{"title":"Evaluation of the vibration accelerations of drill bit for the well rotative-vibration drilling using the cavitation hydrovibrator","authors":"O. Nikolayev, Y. Zhulay, Y. Kvasha, N. Dzoz","doi":"10.1504/ijmme.2020.10030568","DOIUrl":"https://doi.org/10.1504/ijmme.2020.10030568","url":null,"abstract":"Cavitation hydrovibrator is one of the promising devices to intensify drilling of geological prospecting and production wells. Cavitation hydrovibrator transforms the stationary flow of drilling mud into a discrete-pulsed flow of increased power. The mud oscillating flow in hydrovibrator is converted into high-frequency (1,000 Hz - 20,000 Hz) vibrations of the drill bit. A method for determining the longitudinal vibrations of a drill string with bit has been developed. The method is based on the results of experimental studies of the dynamic interaction between longitudinal oscillations of the drilling string with rock massive by mathematical modeling this process with use of finite-element discretisation of drilling string. An obtained satisfactory convergence of the computed vibration accelerations of the drill bit and experimental data confirms the adequacy of the developed mathematical model and the ability with its help to determine the rational operational modes of the hydrovibrator.","PeriodicalId":38622,"journal":{"name":"International Journal of Mining and Mineral Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43722842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Enhancing productivity through effective spoil stability management in an open cast coal mine 通过对露天煤矿矸石稳定性的有效管理，提高生产效率
International Journal of Mining and Mineral Engineering Pub Date : 2020-07-16 DOI: 10.1504/ijmme.2020.10030572
Nompumelelo Mpembe, Begum Genc
{"title":"Enhancing productivity through effective spoil stability management in an open cast coal mine","authors":"Nompumelelo Mpembe, Begum Genc","doi":"10.1504/ijmme.2020.10030572","DOIUrl":"https://doi.org/10.1504/ijmme.2020.10030572","url":null,"abstract":"The paper investigated the best practical dig-spoil sequence which addressed circular failure in waste spoil piles and enhanced productivity through an improved coal exposure rate. This involved the evaluation of two overhand-chop and three dozer pushover dig-spoil sequences through DragSim software and an MS Excel dragline calculator. The software provided spoil profiles for geotechnical analysis and the calculator generated productivity indicators (digging rate, coal exposure rate and rehandle percentage). The sequences were ranked in terms of the ability to meet the mine budget requirements and best practice standards for stability and productivity. The best practical dig-spoil sequence was the oblique spoil-side dozer pushover sequence. It was recommended that Pit B be split in two halves: a modified overhand-chop and oblique spoil-side dozer pushover sequence for the first and second half, respectively.","PeriodicalId":38622,"journal":{"name":"International Journal of Mining and Mineral Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46373949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigating the effects of gemstone mining on the environs: a case study of Komu in Southwestern Nigeria 调查宝石开采对环境的影响：以尼日利亚西南部科穆为例
International Journal of Mining and Mineral Engineering Pub Date : 2020-07-16 DOI: 10.1504/ijmme.2020.10030565
M. Onifade, A. Aladejare, Q. B. Adewumi
{"title":"Investigating the effects of gemstone mining on the environs: a case study of Komu in Southwestern Nigeria","authors":"M. Onifade, A. Aladejare, Q. B. Adewumi","doi":"10.1504/ijmme.2020.10030565","DOIUrl":"https://doi.org/10.1504/ijmme.2020.10030565","url":null,"abstract":"This research examined the effects of gemstone mining by investigating soil and water samples collected from different locations of a mining community in Nigeria taking into consideration the concentration of heavy metals and micronutrients, physiochemical parameters and cation exchange capacity present in the samples. The concentrations of heavy metals (lead, copper, cadmium, zinc and iron), micro nutrients (sodium, magnesium and aluminium) and physiochemical parameters (pH, hardness, chloride, alkalinity, total solids, total dissolved solids, total suspended solids, sodium and potassium) obtained from the sample locations varies from one location to another. When the results of soil and water analysis were compared with WHO standards, concentrations of most of the parameters analysed were lesser than the WHO acceptable limit. However, the concentrations of cadmium and iron in the soil samples are higher than the WHO permissible limit in soil which implies that the soil is toxic and not good for agriculture purposes.","PeriodicalId":38622,"journal":{"name":"International Journal of Mining and Mineral Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49547205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Mechanical behaviour and failure characteristics of cemented paste backfill under lateral unloading condition 侧向卸载条件下胶结膏体充填体力学行为及破坏特征
International Journal of Mining and Mineral Engineering Pub Date : 2020-03-09 DOI: 10.1504/ijmme.2020.10027491
Hongjian Lu, Peng Liang
{"title":"Mechanical behaviour and failure characteristics of cemented paste backfill under lateral unloading condition","authors":"Hongjian Lu, Peng Liang","doi":"10.1504/ijmme.2020.10027491","DOIUrl":"https://doi.org/10.1504/ijmme.2020.10027491","url":null,"abstract":"A key issue associated with mine backfill design is the determination of mechanical behaviour and failure characteristics of the cemented paste backfill (CPB), especially for CBP under lateral unloading conditions caused by excavation of adjacent stopes. In this research, a series of lateral unloading tests with RFPA3D were conducted to investigate the relationships among the cement-tailings ratio (1:4 and 1:8), lateral unloading stress (0 MPa, 0.2 MPa, 0.4 MPa, 0.6 MPa, 0.8 MPa and 1.0 MPa), mechanical behaviour, failure modes and acoustic emissions (AE) characteristics. Similar mechanical behaviour of all the CPB specimens was obtained. With different cement-tailings ratios and preloading stress values, the ultimate failure modes of CPB specimens show different forms. Additionally, increasing the preloading stress value caused a rising of AE counts. The results of this study can provide a significant reference for the backfill design and study of underground mining.","PeriodicalId":38622,"journal":{"name":"International Journal of Mining and Mineral Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42204766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Effect of aggloflotation of coal slimes by use Flomin C9606 as a collector Flomin C9606捕收剂对煤泥絮凝的影响
International Journal of Mining and Mineral Engineering Pub Date : 2020-03-09 DOI: 10.1504/ijmme.2020.10027479
R. M. Kasomo, Sammy O Ombiro
{"title":"Effect of aggloflotation of coal slimes by use Flomin C9606 as a collector","authors":"R. M. Kasomo, Sammy O Ombiro","doi":"10.1504/ijmme.2020.10027479","DOIUrl":"https://doi.org/10.1504/ijmme.2020.10027479","url":null,"abstract":"In many coal preparation concentrators, coal slimes form the major challenge due to difficulties in its processing and upgrading. Several techniques are currently being devised in coal industries to aid in beneficiation of the coals in their finer sizes. Ultra-fine coal particles are exclusively processed by oil agglomeration, selective flocculation or hydrophobic flocculation flotation techniques. In this research, the focus is on hydrophobic flocculation flotation to clean ultrafine coal particles. Collector dosage, agitation stirring speed and grinding fineness batch tests were conducted, followed by flocculation and froth flotation. The results showed that optimum collector dosage (Flomin C9606) was 10 kgs/ton, the impeller speed 1,500 rpm and 30 minutes achieved the best grinding fineness. Two stage flow sheet produced froth recovery of 86.28% and ash content was 6.39%. It was therefore concluded that Flomin C9606, as a collector, was capable of obtaining clean coal product from these results.","PeriodicalId":38622,"journal":{"name":"International Journal of Mining and Mineral Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46928764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Implementation of Industry 4.0 technologies in the mining industry - a case study 在采矿业实施工业 4.0 技术--案例研究
International Journal of Mining and Mineral Engineering Pub Date : 2020-03-09 DOI: 10.1504/ijmme.2020.10027477
M. Sishi, A. Telukdarie
{"title":"Implementation of Industry 4.0 technologies in the mining industry - a case study","authors":"M. Sishi, A. Telukdarie","doi":"10.1504/ijmme.2020.10027477","DOIUrl":"https://doi.org/10.1504/ijmme.2020.10027477","url":null,"abstract":"In modern mining, it is imperative to have real-time flow of information between enterprise level and shop floor systems. The gaps that exist between these spheres make it difficult for managers to...","PeriodicalId":38622,"journal":{"name":"International Journal of Mining and Mineral Engineering","volume":" 71","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141224154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 46
Impact of hydraulic fracturing and borehole spacing on gas drainage along a coal seam 水力压裂和井距对煤层瓦斯抽放的影响
International Journal of Mining and Mineral Engineering Pub Date : 2020-03-09 DOI: 10.1504/ijmme.2020.10027485
Huayong Lv
{"title":"Impact of hydraulic fracturing and borehole spacing on gas drainage along a coal seam","authors":"Huayong Lv","doi":"10.1504/ijmme.2020.10027485","DOIUrl":"https://doi.org/10.1504/ijmme.2020.10027485","url":null,"abstract":"Hydraulic fracturing is a technology employed to improve coal seam permeability and gas drainage. This study uses theoretical analysis and field testing to examine the mechanisms of hydraulic fracturing of a coal seam, including the initiation conditions of boreholes and cracks, main crack forms, and expansion and extension processes. RFPA2D-flow software was used to develop a numerical simulation of double-hole hydraulic fracturing, from crack initiation to expansion and extension in the coal body. The numerical simulation revealed characteristics and evolution of the stresses, water pressure and acoustic emission around the boreholes and estimated the permeability improvement range of fracturing holes under conditions of different hole spacing. Results of a field industrial test showed that the daily gas drainage pure flows increased by 5.8-17.6 times, the average gas drainage velocity reached 3.76 m3/min (maximum 10 m3/min), the gas drainage rate of the working face reached 57.32%, and the influence radius of single-hole hydraulic fracturing is approximately 5 m. This study demonstrates that hydraulic fracturing and permeability improvement technology can greatly improve the gas drainage rate of boreholes in a coal seam.","PeriodicalId":38622,"journal":{"name":"International Journal of Mining and Mineral Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45021109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
CFD simulations of DPM flow patterns generated by vehicles in underground mines for different air flow and exhaust pipe directions 不同风量和排气管方向下井下车辆产生的DPM流型CFD模拟
International Journal of Mining and Mineral Engineering Pub Date : 2020-03-09 DOI: 10.1504/ijmme.2020.10027488
R. Morla, S. Karekal, A. Godbole
{"title":"CFD simulations of DPM flow patterns generated by vehicles in underground mines for different air flow and exhaust pipe directions","authors":"R. Morla, S. Karekal, A. Godbole","doi":"10.1504/ijmme.2020.10027488","DOIUrl":"https://doi.org/10.1504/ijmme.2020.10027488","url":null,"abstract":"In this paper, an attempt is made to model diesel particulate matter (DPM) flows generated by load haul dumpers (LHDs) and trucks in an underground mine environment for different DPM flow and intake air flow directions and exhaust pipe directions. The results obtained show that the DPM concentration near the vehicle was dependent on exhaust pipe location and direction. If the exhaust pipe is located at the rear or the top of the vehicle, the vehicle operator may be susceptible to exposure to high concentrations of DPM. If the exhaust pipe is located at the bottom of the vehicle, the operator is less likely to be exposed to high concentrations of DPM. Finally, at 10 m downstream of the loading bay the very high concentrations DPM particles tend to spread over the entire cross section of the roadway.","PeriodicalId":38622,"journal":{"name":"International Journal of Mining and Mineral Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47724850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical simulation on the breaking of coal and rock with different fillers 不同填料破碎煤岩的数值模拟
International Journal of Mining and Mineral Engineering Pub Date : 2020-01-01 DOI: 10.1504/ijmme.2020.10031901
Yuesong Tang, Fei Liu
{"title":"Numerical simulation on the breaking of coal and rock with different fillers","authors":"Yuesong Tang, Fei Liu","doi":"10.1504/ijmme.2020.10031901","DOIUrl":"https://doi.org/10.1504/ijmme.2020.10031901","url":null,"abstract":"","PeriodicalId":38622,"journal":{"name":"International Journal of Mining and Mineral Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66731095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stress analysis of the stope under the influence of horizontal tectonic stress 水平构造应力作用下采场应力分析
International Journal of Mining and Mineral Engineering Pub Date : 2020-01-01 DOI: 10.1504/ijmme.2020.10031906
Fengda Zhang
{"title":"Stress analysis of the stope under the influence of horizontal tectonic stress","authors":"Fengda Zhang","doi":"10.1504/ijmme.2020.10031906","DOIUrl":"https://doi.org/10.1504/ijmme.2020.10031906","url":null,"abstract":"","PeriodicalId":38622,"journal":{"name":"International Journal of Mining and Mineral Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66731160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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